Keystones — Lintel
Five GCSE retrieval questions · 3 July 2022 · mathsvault.uk/keystones
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1. Number Converting to standard form
290000
Answer: 2.9 × 105 -
2. Algebra Factorising monic quadratics
Factorise: x² - 8x + 15
Answer: (x - 3)(x - 5) -
3. Geometry SOHCAHTOA — missing length
Hypotenuse = 28cm, angle = 55°. Find adjacent side
Answer: 16.cm -
4. Ratio Mixed ratio problems
Express the first part of 5:6 as a fraction in simplest form
Answer: 5⁄11 -
5. Statistics Mean
The mean of 6 numbers is 24. If 5 of them are 37, 27, 42, 23, 26, what is the missing number?
Answer: -11